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參數(shù)資料
| 型號： | MT4JSF6464HIY-80BXX |
| 元件分類： | DRAM |
| 英文描述： | 64M X 64 DDR DRAM MODULE, ZMA204 |
| 封裝： | LEAD FREE, SODIMM-204 |
| 文件頁數(shù)： | 4/19頁 |
| 文件大?。?/td> | 618K |
| 代理商： | MT4JSF6464HIY-80BXX |
PDF: 09005aef82b2f090/Source: 09005aef82b2f012
Micron Technology, Inc., reserves the right to change products or specifications without notice.
JSF4C64_64x64HY.fm - Rev. B 3/08 EN
12
2007 Micron Technology, Inc. All rights reserved
512MB (x64, SR) 204-Pin DDR3 SDRAM SODIMM
Temperature Sensor with Serial Presence-Detect EEPROM
The temperature sensor continuously monitors the module’s temperature and can be
read back at any time over the I2C bus shared with the SPD EEPROM.
EVENT# Pin
The temperature sensor also adds the EVENT# pin (open drain). Not used by the SPD
EEPROM, EVENT# is a temperature sensor output used to flag critical events that can be
set up in the sensor’s configuration register.
EVENT# has three defined modes of operation: interrupt mode, compare mode, and
critical temperature mode. The open-drain output of EVENT# under the three separate
operating modes is illustrated in Figure 3 on page 13. Event thresholds are programmed
in the 0x01 register using a hysteresis. The alarm window provides a comparison
window, with upper and lower limits set in the alarm upper boundary register and the
alarm lower boundary register, respectively. When the alarm window is enabled,
EVENT# will trigger whenever the temperature is outside the MIN or MAX values set by
the user.
The interrupt mode enables software to reset EVENT# after a critical temperature
threshold has been detected. Threshold points are set in the configuration register by the
user. This mode triggers the critical temperature limit and both the MIN and MAX of the
temperature window.
Table 10:
Temperature Sensor with Serial Presence-Detect EEPROM Operating Conditions
Parameter/Condition
Symbol
Min
Max
Units
Supply voltage
VDDSPD
+3.0
+3.6
V
Supply current: VDD = 3.3V
IDD
–+2.0
mA
Input high voltage: Logic 1; SCL, SDA
VIH
+1.45
VDDSPD + 1
V
Input low voltage: Logic 0; SCL, SDA
VIL
–+0.55
V
Output low voltage: IOUT = 2.1mA
VOL
–+0.4
V
Input current
IIN
–5.0
+5.0
A
Temperature sensing range
–
–40
+125
°C
Temperature sensor accuracy (initial release)
–
–2.0
+2.0
°C
Temperature sensor accuracy
–
–1.0
+1.0
°C
Table 11:
Sensor and EEPROM Serial Interface Timing
Parameter/Condition
Symbol
Min
Max
Units
Time bus must be free before a new transition can start
tBUF
4.7
–
s
SDA fall time
tF20
300
ns
SDA rise time
tR
–
1,000
ns
Data hold time
tHD:DAT
200
900
ns
Start condition hold time
tH:STA
4.0
–
s
Clock HIGH period
tHIGH
4.0
50
s
Clock LOW period
tLOW
4.7
–
s
SCL clock frequency
fSCL
10
100
kHz
Data setup time
tSU:DAT
250
–
ns
Start condition setup time
tSU:STA
4.7
–
s
Stop condition setup time
tSU:STO
4.0
–
s
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